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            <h2 class="toc-title">目录</h2>
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        </div><article class="page single"><h1 class="single-title animate__animated animate__flipInX">双链表</h1><div class="post-meta">
            <div class="post-meta-line"><span class="post-author"><a href="/" title="Author" rel="author" class="author"><i class="fas fa-user-circle fa-fw" aria-hidden="true"></i>MC</a></span>&nbsp;<span class="post-category">收录于 <a href="/categories/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84%E4%B8%8E%E7%AE%97%E6%B3%95/"><i class="far fa-folder fa-fw" aria-hidden="true"></i>数据结构与算法</a></span></div>
            <div class="post-meta-line"><i class="far fa-calendar-alt fa-fw" aria-hidden="true"></i>&nbsp;<time datetime="2017-04-22">2017-04-22</time>&nbsp;<i class="fas fa-pencil-alt fa-fw" aria-hidden="true"></i>&nbsp;约 1450 字&nbsp;
                <i class="far fa-clock fa-fw" aria-hidden="true"></i>&nbsp;预计阅读 3 分钟&nbsp;<span id="/%E5%8F%8C%E9%93%BE%E8%A1%A8/" class="leancloud_visitors" data-flag-title="双链表">
                        <i class="far fa-eye fa-fw" aria-hidden="true"></i>&nbsp;<span class=leancloud-visitors-count></span>&nbsp;次阅读
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                    <span>目录</span>
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                <div class="details-content toc-content" id="toc-content-static"><nav id="TableOfContents">
  <ul>
    <li><a href="#双链表">双链表：</a></li>
    <li><a href="#创建双链表的历程">创建双链表的历程：</a></li>
    <li><a href="#由前向后遍历">由前向后遍历：</a></li>
    <li><a href="#由后向前遍历">由后向前遍历：</a></li>
    <li><a href="#插入历程">插入历程：</a></li>
    <li><a href="#删除历程">删除历程：</a></li>
    <li><a href="#链表排序">链表排序：</a></li>
    <li><a href="#销毁链表">销毁链表</a></li>
  </ul>
</nav></div>
            </div><div class="content" id="content"><h2 id="双链表">双链表：</h2>
<p>双向链表也叫双链表，是链表的一种，它的每个数据结点中都有两个指针，分别指向直接后继和直接前驱。所以，从双向链表中的任意一个结点开始，都可以很方便地访问它的前驱结点和后继结点。
双链表的一些基本操作函数的声明：</p>
<hr>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&lt;stdio.h&gt;</span><span class="cp">
</span></span></span><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&lt;stdlib.h&gt;</span><span class="cp">
</span></span></span><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&lt;string.h&gt;</span><span class="cp">
</span></span></span><span class="line"><span class="cl"><span class="cp"></span>
</span></span><span class="line"><span class="cl"><span class="k">typedef</span> <span class="k">struct</span> <span class="n">Node</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl">	<span class="kt">int</span> <span class="n">data</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">struct</span> <span class="n">Node</span> <span class="o">*</span> <span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">struct</span> <span class="n">Node</span> <span class="o">*</span> <span class="n">prior</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span><span class="n">Node</span><span class="p">,</span> <span class="o">*</span><span class="n">Pnode</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="n">Pnode</span> <span class="nf">create_list</span><span class="p">(</span><span class="kt">void</span><span class="p">);</span>	<span class="c1">//创建节点
</span></span></span><span class="line"><span class="cl"><span class="c1"></span><span class="kt">void</span> <span class="nf">traverse_list</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">);</span>	<span class="c1">//遍历链表打印 
</span></span></span><span class="line"><span class="cl"><span class="c1"></span><span class="kt">void</span> <span class="nf">fantraverse_list</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"><span class="kt">int</span> <span class="nf">ListLength</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"><span class="n">Pnode</span> <span class="nf">ListInsert</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">);</span> 
</span></span><span class="line"><span class="cl"><span class="n">Pnode</span> <span class="nf">ListDelete</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">,</span> <span class="kt">int</span> <span class="n">x</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"><span class="n">Pnode</span> <span class="nf">ListSort</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">);</span> 
</span></span><span class="line"><span class="cl"><span class="kt">void</span> <span class="nf">ListClear</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">);</span>
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="创建双链表的历程">创建双链表的历程：</h2>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">Pnode create_list(void)
</span></span><span class="line"><span class="cl">{
</span></span><span class="line"><span class="cl">	int i, len;
</span></span><span class="line"><span class="cl">	Pnode pHead, pTemp;
</span></span><span class="line"><span class="cl">	pHead = (Pnode)malloc(sizeof(Node));
</span></span><span class="line"><span class="cl">	Pnode pNew;
</span></span><span class="line"><span class="cl">	if(NULL == pHead){
</span></span><span class="line"><span class="cl">		printf(&#34;内存分配出错！\n&#34;);
</span></span><span class="line"><span class="cl">		exit(1);
</span></span><span class="line"><span class="cl">	} 
</span></span><span class="line"><span class="cl">	pHead = pTemp;
</span></span><span class="line"><span class="cl">	pTemp-&gt;next = NULL;
</span></span><span class="line"><span class="cl">	printf(&#34;请输入你想要的链表的长度：&#34;);
</span></span><span class="line"><span class="cl">	scanf(&#34;%d&#34;, &amp;len);
</span></span><span class="line"><span class="cl">	for(i = 0; i &lt; len; i++){
</span></span><span class="line"><span class="cl">		pNew = (Pnode)malloc(sizeof(Node));
</span></span><span class="line"><span class="cl">		if(NULL == pNew){
</span></span><span class="line"><span class="cl">			printf(&#34;新节点内存分配出错。\n&#34;);
</span></span><span class="line"><span class="cl">			exit(1);
</span></span><span class="line"><span class="cl">		}
</span></span><span class="line"><span class="cl">		printf(&#34;请输入新节点的值：&#34;);
</span></span><span class="line"><span class="cl">		scanf(&#34;%d&#34;, &amp;pNew-&gt;data);
</span></span><span class="line"><span class="cl">		pTemp-&gt;next = pNew;
</span></span><span class="line"><span class="cl">		pNew-&gt;prior = pTemp;
</span></span><span class="line"><span class="cl">		pNew-&gt;next = NULL;
</span></span><span class="line"><span class="cl">		pTemp = pNew;
</span></span><span class="line"><span class="cl">	}
</span></span><span class="line"><span class="cl">	(pHead-&gt;next)-&gt;prior = NULL;
</span></span><span class="line"><span class="cl">	return pHead;
</span></span><span class="line"><span class="cl">}
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="由前向后遍历">由前向后遍历：</h2>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
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<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="kt">void</span> <span class="nf">traverse_list</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp</span> <span class="o">=</span> <span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span> 
</span></span><span class="line"><span class="cl">	<span class="k">if</span><span class="p">(</span><span class="n">pTemp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;链表为空。</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">else</span><span class="p">{</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;由前到后链表的值分别是：&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="k">while</span><span class="p">(</span><span class="n">pTemp</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">			<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;%d &#34;</span><span class="p">,</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">data</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">			<span class="n">pTemp</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">);</span> 
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="由后向前遍历">由后向前遍历：</h2>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
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</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="kt">void</span> <span class="nf">fantraverse_list</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp</span> <span class="o">=</span> <span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">if</span><span class="p">(</span><span class="n">pTemp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;链表为空。</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="nf">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">while</span><span class="p">(</span><span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">!=</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;由后到前链表的值分别是：&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="k">while</span><span class="p">(</span><span class="n">pTemp</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;%d &#34;</span><span class="p">,</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">data</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">prior</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="插入历程">插入历程：</h2>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
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</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="n">Pnode</span> <span class="nf">ListInsert</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">	<span class="kt">int</span> <span class="n">x</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;请输入你想在那个值得前面或后面插：&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">scanf</span><span class="p">(</span><span class="s">&#34;%d&#34;</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">x</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp</span> <span class="o">=</span> <span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pInsert</span><span class="p">,</span> <span class="n">pTemp2</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">while</span><span class="p">(</span><span class="n">pTemp</span> <span class="o">&amp;&amp;</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">data</span> <span class="o">!=</span> <span class="n">x</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span> 
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">if</span><span class="p">(</span><span class="n">pTemp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;在链表中没有找到%d的值。</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">,</span> <span class="n">x</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="k">return</span> <span class="n">pHead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">else</span><span class="p">{</span>
</span></span><span class="line"><span class="cl">		<span class="n">pInsert</span> <span class="o">=</span> <span class="p">(</span><span class="n">Pnode</span><span class="p">)</span><span class="nf">malloc</span><span class="p">(</span><span class="k">sizeof</span><span class="p">(</span><span class="n">Node</span><span class="p">));</span>
</span></span><span class="line"><span class="cl">		<span class="kt">int</span> <span class="n">s</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;请输入要插入元素的值：&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="nf">scanf</span><span class="p">(</span><span class="s">&#34;%d&#34;</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">data</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;请选择插在%d之前还是之后。(“0”前“1”后)&#34;</span><span class="p">,</span> <span class="n">x</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="k">do</span><span class="p">{</span> 
</span></span><span class="line"><span class="cl">			<span class="nf">scanf</span><span class="p">(</span><span class="s">&#34;%d&#34;</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">s</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">			<span class="k">if</span><span class="p">(</span><span class="n">s</span> <span class="o">==</span> <span class="mi">0</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">				<span class="k">if</span><span class="p">(</span><span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">					<span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pInsert</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">					<span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pInsert</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">					<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pTemp</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">					<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">					<span class="k">break</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="p">}</span>
</span></span><span class="line"><span class="cl">				<span class="n">pTemp2</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">prior</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pTemp</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pTemp2</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pTemp2</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pInsert</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pInsert</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">			<span class="p">}</span>
</span></span><span class="line"><span class="cl">			<span class="k">if</span><span class="p">(</span><span class="n">s</span> <span class="o">==</span> <span class="mi">1</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">				<span class="k">if</span><span class="p">(</span><span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">					<span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pInsert</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">					<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pTemp</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">					<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">					<span class="k">break</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="p">}</span>
</span></span><span class="line"><span class="cl">				<span class="n">pTemp2</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pTemp2</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pInsert</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pTemp</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pInsert</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pTemp2</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pInsert</span><span class="p">;</span> 
</span></span><span class="line"><span class="cl">			<span class="p">}</span>
</span></span><span class="line"><span class="cl">		<span class="p">}</span><span class="k">while</span><span class="p">(</span><span class="o">!</span><span class="p">(</span><span class="n">s</span> <span class="o">==</span> <span class="mi">0</span> <span class="o">||</span> <span class="n">s</span> <span class="o">==</span> <span class="mi">1</span><span class="p">));</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	
</span></span><span class="line"><span class="cl">	<span class="k">return</span> <span class="n">pHead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="删除历程">删除历程：</h2>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
</span><span class="lnt"> 2
</span><span class="lnt"> 3
</span><span class="lnt"> 4
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</span><span class="lnt">25
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="n">Pnode</span> <span class="nf">ListDelete</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">,</span> <span class="kt">int</span> <span class="n">x</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp</span> <span class="o">=</span> <span class="n">pHead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">while</span><span class="p">(</span><span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">&amp;&amp;</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="o">-&gt;</span><span class="n">data</span> <span class="o">!=</span> <span class="n">x</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">if</span><span class="p">(</span><span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;链表中没找到%d。</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">,</span> <span class="n">x</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="k">return</span> <span class="n">pHead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp2</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">if</span><span class="p">(</span><span class="n">pTemp2</span> <span class="o">==</span> <span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pTemp2</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="p">(</span><span class="n">pTemp2</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">)</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">pTemp2</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">else</span><span class="p">{</span>
</span></span><span class="line"><span class="cl">		<span class="n">Pnode</span> <span class="n">pTemp2</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pTemp2</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="p">(</span><span class="n">pTemp2</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">)</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pTemp</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="nf">free</span><span class="p">(</span><span class="n">pTemp2</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="k">return</span> <span class="n">pHead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="链表排序">链表排序：</h2>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
</span><span class="lnt"> 2
</span><span class="lnt"> 3
</span><span class="lnt"> 4
</span><span class="lnt"> 5
</span><span class="lnt"> 6
</span><span class="lnt"> 7
</span><span class="lnt"> 8
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</span><span class="lnt">27
</span><span class="lnt">28
</span><span class="lnt">29
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</span><span class="lnt">36
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</span><span class="lnt">41
</span><span class="lnt">42
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="n">Pnode</span> <span class="nf">ListSort</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">pHead</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pFirst</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pMin</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pFmin</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTail</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp2</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">if</span><span class="p">(</span><span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span> 
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;链表为空！</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="k">return</span> <span class="n">pHead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="k">if</span><span class="p">(</span><span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;只有一组数据无需排序&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="n">pFirst</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span> 
</span></span><span class="line"><span class="cl">	<span class="k">while</span><span class="p">(</span><span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">!=</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="k">for</span><span class="p">(</span><span class="n">pTemp</span> <span class="o">=</span> <span class="n">pHead</span><span class="p">,</span> <span class="n">pMin</span> <span class="o">=</span> <span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">!=</span> <span class="nb">NULL</span><span class="p">;</span> <span class="n">pTemp</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">			<span class="k">if</span><span class="p">(</span><span class="n">pMin</span><span class="o">-&gt;</span><span class="n">data</span> <span class="o">&gt;</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="o">-&gt;</span><span class="n">data</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">				<span class="n">pFmin</span> <span class="o">=</span> <span class="n">pTemp</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">				<span class="n">pMin</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">			<span class="p">}</span>
</span></span><span class="line"><span class="cl">		<span class="p">}</span>
</span></span><span class="line"><span class="cl">		<span class="k">if</span><span class="p">(</span><span class="n">pFirst</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">			<span class="n">pFirst</span> <span class="o">=</span> <span class="n">pMin</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">			<span class="n">pFirst</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">			<span class="n">pTail</span> <span class="o">=</span> <span class="n">pMin</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="p">}</span>
</span></span><span class="line"><span class="cl">		<span class="k">else</span><span class="p">{</span>
</span></span><span class="line"><span class="cl">			<span class="n">pTail</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pMin</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">			<span class="n">pMin</span><span class="o">-&gt;</span><span class="n">prior</span> <span class="o">=</span> <span class="n">pTail</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">			<span class="n">pTail</span> <span class="o">=</span> <span class="n">pMin</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="p">}</span>
</span></span><span class="line"><span class="cl">		<span class="k">if</span><span class="p">(</span><span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">==</span> <span class="n">pMin</span><span class="p">)</span>
</span></span><span class="line"><span class="cl">			<span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pMin</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="k">else</span>
</span></span><span class="line"><span class="cl">			<span class="n">pFmin</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pMin</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl">	<span class="n">pTail</span><span class="o">-&gt;</span><span class="n">next</span>  <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">pHead</span><span class="o">-&gt;</span><span class="n">next</span> <span class="o">=</span> <span class="n">pFirst</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	
</span></span><span class="line"><span class="cl">	<span class="k">return</span> <span class="n">pHead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="销毁链表">销毁链表</h2>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span><span class="lnt">2
</span><span class="lnt">3
</span><span class="lnt">4
</span><span class="lnt">5
</span><span class="lnt">6
</span><span class="lnt">7
</span><span class="lnt">8
</span><span class="lnt">9
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="kt">void</span> <span class="nf">ListClear</span><span class="p">(</span><span class="n">Pnode</span> <span class="n">Phead</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp</span> <span class="o">=</span> <span class="n">Phead</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">pTemp2</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="k">while</span><span class="p">(</span><span class="n">pTemp</span> <span class="o">!=</span> <span class="nb">NULL</span><span class="p">){</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp2</span> <span class="o">=</span> <span class="n">pTemp</span><span class="o">-&gt;</span><span class="n">next</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">		<span class="nf">free</span><span class="p">(</span><span class="n">pTemp</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">		<span class="n">pTemp</span> <span class="o">=</span> <span class="n">pTemp2</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="p">}</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>一个测试 函数：</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
</span><span class="lnt"> 2
</span><span class="lnt"> 3
</span><span class="lnt"> 4
</span><span class="lnt"> 5
</span><span class="lnt"> 6
</span><span class="lnt"> 7
</span><span class="lnt"> 8
</span><span class="lnt"> 9
</span><span class="lnt">10
</span><span class="lnt">11
</span><span class="lnt">12
</span><span class="lnt">13
</span><span class="lnt">14
</span><span class="lnt">15
</span><span class="lnt">16
</span><span class="lnt">17
</span><span class="lnt">18
</span><span class="lnt">19
</span><span class="lnt">20
</span><span class="lnt">21
</span><span class="lnt">22
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="kt">int</span> <span class="nf">main</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="p">{</span>
</span></span><span class="line"><span class="cl">	<span class="n">Pnode</span> <span class="n">head</span> <span class="o">=</span> <span class="nf">create_list</span><span class="p">();</span>
</span></span><span class="line"><span class="cl">	<span class="nf">traverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">fantraverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;链表的长度是：%d</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">,</span> <span class="nf">ListLength</span><span class="p">(</span><span class="n">head</span><span class="p">));</span> 
</span></span><span class="line"><span class="cl">	<span class="n">head</span> <span class="o">=</span> <span class="nf">ListInsert</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">traverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">fantraverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="kt">int</span> <span class="n">x</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">	<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;请输入你想删除的值：&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">scanf</span><span class="p">(</span><span class="s">&#34;%d&#34;</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">x</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="n">head</span> <span class="o">=</span> <span class="nf">ListDelete</span><span class="p">(</span><span class="n">head</span><span class="p">,</span> <span class="n">x</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">traverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">fantraverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span> 
</span></span><span class="line"><span class="cl">	<span class="nf">printf</span><span class="p">(</span><span class="s">&#34;排序后的链表：&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="n">head</span> <span class="o">=</span> <span class="nf">ListSort</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">traverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">fantraverse_list</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="nf">ListClear</span><span class="p">(</span><span class="n">head</span><span class="p">);</span>
</span></span><span class="line"><span class="cl">	<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>有几个函数没写^.^</p>
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                <span>更新于 2017-04-22</span>
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